package tutorial;

import java.util.List;
import java.util.Random;

import net.minecraft.block.Block;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.world.World;
import net.minecraft.world.chunk.IChunkProvider;
import net.minecraft.world.gen.feature.WorldGenMinable;
import cpw.mods.fml.common.IWorldGenerator;

public class EventManager implements IWorldGenerator
{
	static public World World;
	static public EntityPlayer Player;
	
	static public void RegisterWorld(World world)
	{
    	if (true) //Player == null)
    	{
    		World = world;
	    	world.getPlayerEntityByName("name");
	    	List players = world.playerEntities;
	    	
	    	for(int i = 0; i < players.size(); i++)
	    	{
	    		EntityPlayer p = (EntityPlayer)players.get(i);
	    		Player = p;
	    	}
    	}
	}
	
	public void generate(Random random, int chunkX, int chunkZ, World world, IChunkProvider chunkGenerator, IChunkProvider chunkProvider)
	{
		if (Player == null)
			RegisterWorld(world);
		
		switch (world.provider.dimensionId)
		{
		case -1:
			generateNether(world, random, chunkX * 16, chunkZ * 16);
		case 0:
			generateSurface(world, random, chunkX * 16, chunkZ * 16);
		case 1:
			generateEnd(world, random, chunkX * 16, chunkZ * 16);
		}
	}

	private void generateEnd(World world, Random random, int x, int z)
	{
		// Tutorial.tutorialBlock
		this.addOreSpawn(Block.blockDiamond, world, random, x, z, 16, 16, 10, 1000, 15, 150);

	}

	private void generateSurface(World world, Random random, int x, int z)
	{
		//this.addOreSpawn(Tutorial.tutorialBlock, world, random, x, z, 16, 16, 4 + random.nextInt(3), 5, 15, 50);
		this.addOreSpawn(Tutorial.tutorialBlock, world, random, x, z, 16, 16, 7, 10, 5, 100);
	}

	private void generateNether(World world, Random random, int x, int z)
	{
		this.addOreSpawn(Block.blockSnow, world, random, x, z, 16, 16, 10, 1000, 5, 100);

	}

	/**
	 * Adds an Ore Spawn to Minecraft. Simply register all Ores to spawn with this method in your Generation method in your IWorldGeneration extending Class
	 * 
	 * @param The Block to spawn
	 * @param The World to spawn in
	 * @param A Random object for retrieving random positions within the world to spawn the Block
	 * @param An int for passing the X-Coordinate for the Generation method
	 * @param An int for passing the Z-Coordinate for the Generation method
	 * @param An int for setting the maximum X-Coordinate values for spawning on the X-Axis on a Per-Chunk basis
	 * @param An int for setting the maximum Z-Coordinate values for spawning on the Z-Axis on a Per-Chunk basis
	 * @param An int for setting the maximum size of a vein
	 * @param An int for the Number of chances available for the Block to spawn per-chunk
	 * @param An int for the minimum Y-Coordinate height at which this block may spawn
	 * @param An int for the maximum Y-Coordinate height at which this block may spawn
	 **/
	public void addOreSpawn(Block block, World world, Random random, int blockXPos, int blockZPos, int maxX, int maxZ, int maxVeinSize, int chancesToSpawn, int minY, int maxY)
	{
		int maxPossY = minY + (maxY - 1);
		assert maxY > minY : "The maximum Y must be greater than the Minimum Y";
		assert maxX > 0 && maxX <= 16 : "addOreSpawn: The Maximum X must be greater than 0 and less than 16";
		assert minY > 0 : "addOreSpawn: The Minimum Y must be greater than 0";
		assert maxY < 256 && maxY > 0 : "addOreSpawn: The Maximum Y must be less than 256 but greater than 0";
		assert maxZ > 0 && maxZ <= 16 : "addOreSpawn: The Maximum Z must be greater than 0 and less than 16";

		int diffBtwnMinMaxY = maxY - minY;
		for (int x = 0; x < chancesToSpawn; x++)
		{
			int posX = blockXPos + random.nextInt(maxX);
			int posY = minY + random.nextInt(diffBtwnMinMaxY);
			int posZ = blockZPos + random.nextInt(maxZ);
			(new WorldGenMinable(block.blockID, maxVeinSize)).generate(world, random, posX, posY, posZ);
		}
	}
}